* message.el: Require gmm-utils, remove autoloads.

* message.el: Require gmm-utils, remove autoloads.
(message-tool-bar): Set default based on
gmm-tool-bar-style.
(message-tool-bar-gnome): Add gmm-customize-mode.

* gnus-sum.el (gnus-summary-tool-bar): Set default based on
gmm-tool-bar-style.
(gnus-summary-tool-bar-gnome): Add gmm-customize-mode.

* gnus-group.el (gnus-group-tool-bar): Set default based on
gmm-tool-bar-style.
(gnus-group-tool-bar-gnome): Add gmm-customize-mode.

* gmm-utils.el (gmm-image-directory): Rename variable from
gmm-image-load-path.
(gmm-image-load-path): Use gmm-image-directory.
(gmm-customize-mode): New function.
(gmm-tool-bar-style): New variable.